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In the video I taught the following lesson using the PowerPoint above:
1) Show the warm-up problem on the overhead. Allow students the first 5 minutes of class to answer problem.
2) Present the following lecture following these plans to the class. The notes contain an outline and examples to use within the lecture.
3) To wrap up the lesson, pass out sticky notes to each student and show the wrap up question of differing entropy pairs on the overhead.
a. Collect the sticky notes and leave them in a pile on the desk.
4) At the conclusion of the lecture, inform the students that the assignments for 11.2, 11.3, 11.4, and the mixed review are all due on Friday.
a. Problem sets: http://isite.lps.org/klauten/web/Physics/PhysicsCh10n11Yr11.html
5) Students may use any remaining time to work on homework for this class or others.
Slide 1
Entropy
Slide 2
• Measure of a system’s disorder
What will happen to your bedroom if you just use it and don’t put any work into cleaning it?
• Systems left alone always move toward more disorder
• Most random state
A new deck of cards is ordered, but once you shuffle it, it’s unlikely to be ordered
A bottle of ammonia on the table eventually spreads to fill the room
A hot object heats a cold object
• Disordered system tends to remain disordered
Room won’t clean itself
Oxygen in room won’t pile up in the corner
Slide 3
• Diagram (less entropy)
• Diagram (more entropy)
• Greater disorder leads to less work being done
Slide 4
• Ball moving and has KE
• Wall has internal E
• Ball has internal E
Slide 5
• Ball loses KE
• Wall gains internal E
• Ball gains internal E
Slide 6
• Diagram (before collision)
• Diagram (after collision)
Slide 7
Some people say defines the flow of time
Not a conservative process
• Entropy of universe increases in all processes
Give me an example of a decrease in entropy
• A system’s entropy can decrease only if offset by an increase elsewhere
Slide 8
• Entropy can be decreased by doing work
Refrigerator
• Environment’s entropy will increase to offset
• Universe’s entropy will increase until max
1) Show the warm-up problem on the overhead. Allow students the first 5 minutes of class to answer problem.
2) Present the following lecture following these plans to the class. The notes contain an outline and examples to use within the lecture.
3) To wrap up the lesson, pass out sticky notes to each student and show the wrap up question of differing entropy pairs on the overhead.
a. Collect the sticky notes and leave them in a pile on the desk.
4) At the conclusion of the lecture, inform the students that the assignments for 11.2, 11.3, 11.4, and the mixed review are all due on Friday.
a. Problem sets: http://isite.lps.org/klauten/web/Physics/PhysicsCh10n11Yr11.html
5) Students may use any remaining time to work on homework for this class or others.
Slide 1
Entropy
Slide 2
• Measure of a system’s disorder
What will happen to your bedroom if you just use it and don’t put any work into cleaning it?
• Systems left alone always move toward more disorder
• Most random state
A new deck of cards is ordered, but once you shuffle it, it’s unlikely to be ordered
A bottle of ammonia on the table eventually spreads to fill the room
A hot object heats a cold object
• Disordered system tends to remain disordered
Room won’t clean itself
Oxygen in room won’t pile up in the corner
Slide 3
• Diagram (less entropy)
• Diagram (more entropy)
• Greater disorder leads to less work being done
Slide 4
• Ball moving and has KE
• Wall has internal E
• Ball has internal E
Slide 5
• Ball loses KE
• Wall gains internal E
• Ball gains internal E
Slide 6
• Diagram (before collision)
• Diagram (after collision)
Slide 7
Some people say defines the flow of time
Not a conservative process
• Entropy of universe increases in all processes
Give me an example of a decrease in entropy
• A system’s entropy can decrease only if offset by an increase elsewhere
Slide 8
• Entropy can be decreased by doing work
Refrigerator
• Environment’s entropy will increase to offset
• Universe’s entropy will increase until max